Sensitive Directional Power; Broken Rotor Bar - GE M60 Instruction Manual

CHAPTER 6: ACTUAL VALUES
This menu displays metered values for real and reactive energy. The "SRC 1" text is replaced by the name programmed by
the user for the associated source (see
accumulated, record them and then reset them immediately prior to changing CT or VT characteristics.
6.3.4.8 Frequency metering
ACTUAL VALUES  METERING  SOURCE SRC 1  FREQUENCY
 FREQUENCY
 SRC 1
The metered frequency values are displayed in this menu. The "SRC 1" text is replaced by the name programmed by the
user for the associated source (see
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
SOURCE FREQUENCY
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP  POWER SYSTEM
frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.

6.3.5 Sensitive directional power

ACTUAL VALUES  METERING  SENSITIVE DIRECTIONAL POWER
 SENSITIVE
 DIRECTIONAL POWER
The effective operating quantities of the sensitive directional power elements display here. The display is useful to calibrate
the feature by compensating the angular errors of the CTs and VTs with the use of the

6.3.6 Broken rotor bar

ACTUAL VALUES  METERING  BROKEN ROTOR BAR
 BROKEN ROTOR BAR

M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SRC 1 POS VARHOUR:

0.000 varh
SRC 1 NEG VARHOUR:

0.000 varh
SETTINGS  SYSTEM SETUP  SIGNAL SOURCES
SRC 1 FREQUENCY:

0.00 Hz
SETTINGS  SYSTEM SETUP  SIGNAL SOURCES
settings). The signal used for frequency estimation is low-pass filtered. The final
DIRECTIONAL POWER 1

3: 0.000 W
DIRECTIONAL POWER 2

3: 0.000 W
COMPONENT LEVEL:

-60.0 dB
COMPONENT FREQ.:

61.85 Hz
MOTOR LOAD AT BRB

CALC.: 0.81 x FLA
LOAD DEV.AT BRB

CALC.: 0.01 x FLA
TIME OF BRB CALC.:

2009/03/05 10:22:39
MAXIMUM COMPONENT

LEVEL: -58.3 dB
MAXIMUM COMPONENT

FREQ.: 62.05 Hz
METERING
). Because energy values are
).
and settings.
RCA CALIBRATION
6
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